🎨 Better gem_version loading

Author: autobolt

auth-sanitizer.gemspec

@@ -7,7 +7,7 @@
 # kettle-jem:unfreeze
 
 gem_version =
-  if RUBY_VERSION >= "3.1" # rubocop:disable Gemspec/RubyVersionGlobalsUsage
+  if Gem.ruby_version >= Gem::Version.new("3.1")
     # Loading Version into an anonymous module allows version.rb to get code coverage from SimpleCov!
     # See: https://github.com/simplecov-ruby/simplecov/issues/557#issuecomment-2630782358
     # See: https://github.com/panorama-ed/memo_wise/pull/397